1. Discussion & Limitations Whereas the number of candidaemia cases and AIDS defining fungal infection in HIV patients are systematically surveyed, most fungal infections are unreported. To provide an impression of the overall fungal burden it is necessary to make some assumptions from known datasets and published literature. Since most of our results are extrapolated from surrogate markers of fungal infection the model requires validation. However, it provides a standardised means of estimating and comparing the burden of disease across populations. Results Of Denmark’s 5.6M population, 17% are children under 15 and 12% are women over 60. The number of invasive/systemic/deep fungal infections was estimated to be 1,201 (21.4/100,000 population, Table). Half of these involved Candida (assuming peritonitis adds 50% to the number of candidaemia cases in the ICU setting) and at least a third was due to acute (10% in AML, 0.5-4% in other haematological or transplant patients and 1.3% in hospitalised COPD) and chronic aspergillosis (assuming cases in TB patients account for 33%). Allergic fungal disease cases (ABPA and SAFS) was estimated to be 16,133 assuming rates of ABPA of 2.5% in adult asthmatics (277,502 adults), 15% in CF patients (252 adults) and SAFS of 3.3% of adult asthmatics. Finally, population data was used to estimate the number of recurrent Candida vaginitis 75,812 cases/year assuming a rate 6% in women between 15 and 50. Including the number of tinea capitis based upon stable nationwide rates reported in 1993 and 2003 a total of 75,997 superficial cases/year is estimated. DK has approximately 4,800 people with HIV of whom 75% are on ART. Forty patients were diagnosed with AIDS in 2010. There are few AIDS-related opportunistic fungal infections: 17 PCP, one Cryptococcus meningitis and 6 oesophageal candidiasis cases/year in 2009-11. Also mucormycosis is a rare infection in DK (approx. 1/year). Methods National population data were obtained at www.statistikbanken.dk www.statistikbanken.dk Epidemiology surveys on candidaemia (Arendrup, Clin Microbiol Infect 2013) and dermatophytosis (Saunte, Acta Derm Venerol, 2008) were used. National data on fungal infections among HIV/AIDS patients were retrieved from national registries. Number of fungal infections among cancer, haematological and ICU patients were estimated based on the number of risk patients: 1) Tuberculosis: http://www.ssi.dk/Aktuelt/Nyhedsbreve/EPI- NYT/2012/Uge%2050%20-%202012.aspxhttp://www.ssi.dk/Aktuelt/Nyhedsbreve/EPI- NYT/2012/Uge%2050%20-%202012.aspx; 2) COPD discharges and population with chronic pulmonary disease: the Health data and Information and Communication Technology website at the www.ssi.dk;www.ssi.dk 3) Cystic fibrosis (CF): the CF foundation and a published review of the Danish CF centres; 4) AML (Granfeldt, Clin Epi, 2013) and 5) transplant data: transplant registries (http://leukemia.dk and www.organdonor.dk).http://leukemia.dkwww.organdonor.dk Burden of Serious Fungal Infections in Denmark Maiken Cavling Arendrup 1, Thomas Benfield 2, David W. Denning 3 1 Statens Serum Institut, Copenhagen Denmark and 2 Copenhagen University Hospital Hvidovre, Denmark, 3 The University of Manchester, UK, in association with the LIFE program at www.LIFE-worldwide.org Objective To estimate the annual burden of non-trivial and serious fungal infection in Denmark (DK). Infection Number of infections per underlying disorder per year Total Burden Rate /100.000 None/OtherHIV/AIDSRespiratoryCancer/TxICU Invasive/systemic/deep infections 1,20121.4 Candidaemia84 E 174 E 269 E 5279.4 Candida peritonitis 176 E 1763.1 Mucormycosis 1 10.02 Cryptococcal meningitis 1 1 20.04 Pneumocystis pneumonia 17 Invasive aspergillosis 65 E 210 E 2744.90 Chronic pulmonary aspergillosis 171 E 1713.05 Allergic disease 16,133288 Allergic bronchopulmonary aspergillosis (ABPA) 6975 E 6,975125 Severe asthma with fungal sensitisation (SAFS) 9158 E 9,158163 Superficial infections often requiring systemic treatment 76,0951,356 Oesophageal candidiasis 6 60.1 Recurrent Candida vaginitis (>4x/year) 75,812 E 75,8122,706* Tinea capitis185 3.30 Total burden estimated76,0812416,30424165593,3052,017 Conclusions ~ 2% of Denmark’s population will have a non-trivial fungal infection during one year. underscores the magnitude of the fungal burden.